java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

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Any worker thread runs in background, since it is not intended to loop, is not connected to a Looper.for example doInBackground(). its implementation returns will be passed to onPostExecute() which runs on the UI thread.

Solutions on the web

via GitHub by audax
, 11 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by 4naxr
, 8 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by kanhaiyabgs
, 6 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Ankita Sethi
, 6 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Google Groups by Esa Kylli, 6 months ago
Can't create handler inside thread that has not called Looper.prepare()
via GitHub by azapps
, 2 years ago
Can't create handler inside thread that has not called Looper.prepare()
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.(Handler.java:200)
at android.os.Handler.(Handler.java:114)
at android.widget.Toast$TN.(Toast.java:348)
at android.widget.Toast.(Toast.java:104)
at android.widget.Toast.makeText(Toast.java:262)
at android.widget.Toast.makeText(Toast.java:289)
at de.qabel.qabelbox.startup.fragments.CreateAccountResetPasswordFragment$1.onError(CreateAccountResetPasswordFragment.java:109)
at de.qabel.qabelbox.communication.callbacks.RequestCallback.onResponse(RequestCallback.java:55)
at okhttp3.RealCall$AsyncCall.execute(RealCall.java:126)
at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)

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